David JC MacKay has some better ideas on alternatives to micro-CHP. http://www.inference.phy.cam.ac.uk/withouthotair/c21/page_14...
Fortunately, I'm in California, where the weather is warm, so ideal here would be to use waste heat from an air conditioner to pre-heat water.
David JC MacKay has some better ideas on alternatives to micro-CHP. http://www.inference.phy.cam.ac.uk/withouthotair/c21/page_14...